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Add koan "You can use pattern matching to define [...]" #224

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merged 3 commits into from
Jul 12, 2018
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Add koan "You can use pattern matching to define [...]" #224

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678d15d
Add koan "You can use pattern matching to define [...]"
s-oram Jul 8, 2018
362cbf7
Rename function. format_result() -> inspirational_quote()
s-oram Jul 8, 2018
38cbc98
Add test for new koan
s-oram Jul 12, 2018
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10 changes: 10 additions & 0 deletions lib/koans/13_functions.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,16 @@ defmodule Functions do
assert three_times.("foo") == ___
end

koan "You can use pattern matching to define multiple cases for anonymous functions" do
format_result = fn
{:ok, result} -> "Success is #{result}"
{:error, reason} -> "You just lost #{reason}"
end

assert format_result.({:ok, "no accident"}) == ___
assert format_result.({:error, "the game"}) == ___
end

def times_five_and_then(number, fun), do: fun.(number * 5)
def square(number), do: number * number

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